肝素钠是由猪小肠粘膜加工而成的医药原料，该产品1978年研制成功后，在农村推广，使许多人脱贫致富。提取1公斤（以100单位／毫克为标准）肝素钠粗品，需加工1800～3000根猪小肠。1997年肝素销收购价曾达1．2万元／公斤（质量标准同上）。此后，一路下滑。目前只有4000元／公 Heparin sodium is a pharmaceutical raw material processed from the small intestine mucosa of pigs. After being successfully developed in 1978, the product has been popularized in the rural areas and has helped many people get rid of poverty. 1 kg (100 units/mg as standard) of crude heparin sodium was extracted and 1800-3000 pig intestines were processed. In 1997, the purchase price of heparin had reached 12,000 yuan/kg (the quality standard was the same as above). Since then, all the way down. Currently only 4000 yuan / public